On this date…March 4 launch of STS-62

#OTD in 2012…Journey of shuttle Endeavour through Los Angeles begins

Today marks the 40th anniversary — July 20, 1976 — of the first U.S. robotic landing on another planet by the Viking 1 spacecraft on Mars.

#OTD in 1993…Endeavour launched with the first Spacehab module and retrieval of the European EURECA satellite